problem advisory - semiconductor & system solutions · problem advisory 1. title ... linear...
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PROBLEM ADVISORY
1. TITLE (Class, Function, Type, etc.) 2. DOCUMENT NUMBER
FV5-P-09-01A Linear Mode Application, Power MOSFET 3. DATE (DD-MMM-YY)
23 APRIL 2009 4. MANUFACTURER AND ADDRESS 5. PART NUMBER 6. NATIONAL STOCK NUMBER International Rectifier, HiRel Products FSC 5961 Not Applicable 205 Crawford Street 7. SPECIFICATION 8. TYPE DESIGNATOR Leominster, MA 01453 MIL-PRF-19500 QPL-19500
9. LOT DATE CODE START 10. LOT DATE CODE END Not Applicable Not Applicable 11. MANUFACTURER’S POINT OF CONTACT 12. CAGE 13. MANUFACTURER'S FAX Milt Boden 69210 (978) 537-4246 14. MFR. POC PHONE 15. MANUFACTURER’S E-MAIL (310) 726-8029 [email protected] 16. CROSS REFERENCE VENDOR 17. CROSS REFERENCE CAGE 18. CROSS REFERENCE PART Not Available Not Available Not Available 19. PROBLEM DESCRIPTION / DISCUSSION / EFFECT THIS REVISION PROVIDES NEW INFORMATION FROM INTERNATIONAL RECTIFIER CONCERNING THE SAFE OPERATING AREA CURVES. THE ATTACHED CURVES HAVE BEEN UPDATED WITH THE DC MODE CURVE. PAGE 1 CONTAINS ORIGINAL DOCUMENT. PAGE 2 THROUGH PAGE 14 CONTAIN AMENDMENT A. THIS DOCUMENT IS COMPLETE. This advisory follows numerous inquiries concerning the operating area of the MOSFET for voltages below the zero temperature coefficient point (sometimes referred to as the linear mode of operation). Devices operated below the zero temperature coefficient gate voltage could be susceptible to failure due to a non-uniform current distribution over the die. This results in a safe operating area (SOA) less than predicted by the thermal characteristic of the package. This condition has always existed in all power MOSFETs and has been discussed in the literature [1]. The safe operating area, as presented in datasheets and QPL slash sheets accounts for current focusing for pulses shorter or equal to 10msec. The SOA curves represented for Power MOSFETs do not provide sufficient information for circuit operation with pulses longer than 10msec or in Direct Current (DC) mode. [1] References 1. Breglio, G.; Frisina, F.; Magri, A. and Spirito, P. “Electro-Thermal Instability in Low Voltage Power MOS: Experimental Characterization,” IEEE ISPSD 1999, p. 233. 2. Ely, J. “Are Trench FETs Too Fragile for Linear Applications?” Power Electronics Technology, January 2004, p.14. 3. Kwan, A.; Teasdale, K.; Nguyen, N.; Ambrus, J.; and McDonald, T. “Improved SOA Analysis for Trench MOSFET's using Spirito Approach,” 9th Annual Automotive Electronics Reliability Workshop, Nashville, April 21, 2004.
20. ACTION TAKEN/PLANNED International Rectifier (HiRel Products) plans to update their SOA curves to include a DC curve to further assist designers in utilizing our devices. If device application requires operating the Power MOSFET in the linear mode, then the MOSFET should be characterized to ensure proper and safe operation.
21. DATE MFR. NOTIFIED 22. ANUFACTURER'S RESPONSE M 23. ORIGINATOR ADDRESS/POINT OF CONTACT REPLY ATTACHED Paul Hebert, International Rectifier – HiRel Products Not Applicable Not Applicable (978) 514-6180 NO REPLY [email protected] 24. GIDEP REPRESENTATIVE 25. SIGNATURE 26. DATE
Paul Hebert
22 APR. 2009
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FV5-P-09-01 – REVISION A
1. The following IR Power MOSFET safe operating area (SOA) curves have been updated with the Direct Current (DC) mode curve. 2. Additional parts SOA curves (with DC characterization) will be updated and maintained in the IR website under the Alerts & Notifications section - http://www.irf.com/product-info/hi-rel/alerts.html. ---------------------------------------------- Part numbers contained in this GIDEP amendment include: IRHY57Z30CM – 2N7482T3 IRHNJ67230 – 2N7591U3 IRHY57034CM – 2N7483T3 IRHNJ67130 – 2N7587U3 IRHNA57260SE – 2N7473U2 IRHMS67264 – 2N7585T1 IRHNJ597034 – 2N7520U3 IRHLNA797064 – 2N7622U2 IRHLNA77064 – 2N7604U2 IRHMS597260 – 2N7549T1 IRHM9260 – 2N7426 IRHN9250 – 2N7423U
